Load Case Characterization and Modal Coordinate Estimates from Damper Displacements 2004-01-2713
This paper evaluates estimations of modal coordinates from chassis damper displacements on heavy vehicles. The objective is to study to what extent relative displacements are sufficient as control input for semi active damping systems. The possibility to combine passive damping requirements at different driving conditions is furthermore investigated by studying damper displacements in the phase plane. For both objectives, vehicle simulations with a 3D - tractor semi trailer model are utilized.
Results show that modal coordinate estimates based solely on relative damper displacements, during impact for transient load cases show significant discrepancies to actual motion. For subsequent free oscillations, modal coordinates may however be estimated this way.
Phase plane plots are finally shown to be useful tools to illustrate conflicting demands on passive damping characteristic and to rate expected benefits from different damper techniques.
Citation: Holen, P. and Thorvald, B., "Load Case Characterization and Modal Coordinate Estimates from Damper Displacements," SAE Technical Paper 2004-01-2713, 2004, https://doi.org/10.4271/2004-01-2713. Download Citation
Author(s):
Peter Holen, Boris Thorvald
Affiliated:
Scania Commercial Vehicles AB KTH Vehicle Dynamics, Sweden
Pages: 12
Event:
SAE Commercial Vehicle Engineering Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Vehicle Dynamics and Chassis Developments-SP-1904, SAE 2004 Transactions Journal of Commercial Vehicles-V113-2
Related Topics:
Dampers and shock absorbers
Simulation and modeling
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